If you loved Lake Placid then you should really go back to this Jaws knock off "Alligator"
A baby alligator is flushed down a Chicago toilet and survives by eating discarded lab rats, injected with growth hormones. The small animal grows gigantic, escapes the city sewers, and goes on a rampage.
And it can be seen on youtube
It's BONKERS
http://www.rottentomatoes.com/m/alligator/?search=alligator